Ribbon shift and vibrating mechanism



LIE-ESJH ou V mmw .a mw h V m T s r .N u n A e 4 4 u like* 4 v M. C. CRAWLEY RIBBON SHIFT AND VIBRATIEG MECHANISM May 15, 23-

Filed may l5, 1923. TLASSJR M. c. CRAWLEY RIBBON SHIFT AND VIBRATING MECHANISM --Filed July 25 1922 4 Sheets-Sheet 2 .fn-z "15, 1923?.

Ml .Il Ei M, c. CRAWLEW RI'BBO SHIFT AND VIBK'E'ING MECHANISM Filed July 25 1922' Y 4 sheets-shed s NV TOR ,2% A @Y A TTORNE YS AS. M

May 15, 192s.'

M. C. CRAWLEV RIBBON SHIFT AND VIBRATING HECHANISM Filed July 25, 1922 MW m w A TTORIVE Y' cation,

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Be it'imow that E MANSFILQC. CRAW- A mi?, a ,citizen of tile 1'fmiftel- States of 'merioa, and 'a resident of Groton, county .of .Tompkins, :md Stato of Now-York,i1a.vo invented cortaiiinewpd useful-.i111 rave-- montg, in Ribbon Siif, mid' Vibiating eoh -anisms The-main eturesof'this invention havo'- relation 'to thai type of powerdriven machin@ disolose'din mg'fo'rmo'r' Patent N015 1,156,061 dava-ed @mbsf 12,1915-, in which after each lWorking Stroke thereof 'is emfoyod, .the actuator being automatically im op- R is the ribbon-guide: 'to ,printing position, the

, Vibiming mec ldetail. vertical side View othe hmism siiitod Ato printing po- Sifion fertile uppejoolor, the iypelbaact-u uio? boing-partly in (iot6oc i1-ines;

Figs, 5, Gand 7, are detail -ffiews oithe coior-siiif'; showings" 'the @payrisshifo-i io print j; D

of which iii@ 'following ai specifibabaoiuaop 2li, said 'fmiilofoonsisising .link 21 and latch 20: misuse" ,L mg ang whooup'on 'the boil-spring i2@ cranirfave which is pvotoai ofi m and hasfs other arm osexmiii momodon am carried b1 iii dem; drank-'shaft 1 9 Kigali? .ii e." mit v with ibo-shaft 1G, sid ami heini I "4" cooperate wiiii-auop i: i which latch is conixecofi lo o "n rbfi' mouais feieaimi Tho emilio 1Q isc'onneoted hy momie: of a. .pilook i1 o depoiiding arms '2,5 andsuimbi@ .mor connecting, the aims 25. so xiieA mme;- said jamoiboinpgadmfed -jo 33e now projo'cl'ed forwardiy 'moans o a? ms we con he parvfiwa lslroligii the' medium of @lomo g al, u

type-bar-actuator frame in such position as to swing fore-and-aft with said frame, the forwardv end of this push-bar being in normal engagement with vthe rear edge of the 'depending arm 30 of the bell-crank, whereby, when the actuator-frame is thrown by its spring 26 forward on its Working stroke, the'push-bar will swing. said arm 30 for- Wardly and thus shift the ribbon-guide to printing position. Upon return of the actuator-frame back to inoperative, latched position, the push-bar will be drawn back With it, and the ribbon-guide and bell-crank Will- .gravitate tonormal position', assisted by a retractile coil-spring 36 arranged between alu on bar 31 and a lug carried by'a rearward extension 37 of 'the-horizontal arm 28 4oit the bell-crank.` This spring 36 not only assists in returnin the parts quickly to normal position, but a so serves to cushion the blou7 of the push-bar aganbt'the bellcrank arm. With this simple mechanism, it will be observed that the ribbon-guide is actuated to printing position with the'least ossiblelost-motion and with the highest degree of certainty each time a printing character is operated, thereby eliminating all possible danger of the Vtype-beating the color to the platen. y

For the purpose of elevating the ribbonvibrating mechanism When,` theplaten is elevated in case-shifting, .l connect the pushloar 34 to the supporting rod 3 1 by means of a li`nh38, and bynieans of another .link

39 to ac vertically-movable member of the case-'shift mechanism, sc that, when said member is elevated in shifting for case, the

entire ribbon-vibrating mechanism Will be correspondingly elevated. '-lu the present instance, l have shown the link -39 pivotally connected to a 'forwardly-extending arm 4() Which is carried by a sheet-metal rockshat ell and which is provided With roller l-2 for engagement with the shift-rail 43 on.

the shift-frame of theA platen, this caseshifting mechanism beingi .disclosclin my copendmg case Serial No. 577,357, filed Jui 25,1922;

r o adaptmy ribbon-vibrating mechanism for use with a polychrome ribbon, l provide the push-bar 34.-, at its forward end, with a pair ot' forwardly-projecting.lingers le arran ed in different horizontal planes and in l' ili'erent vertical planes, the lateral separation' being sufficient to permltthe fingers 44 to receive between them the depending arm of the bell-crank. With this simple construction, it will be observed that when.

acolor` indicatorplat the push-bar 3fl`is adjusted laterally to the position shown in Fig. G, and the push-bar is moved forwardly, the `two fin ers L4-Will pass at opposite sides of the bel -crank-arm 30 andv thus cause no actuation thereof; this adjustment is for stenciling,r purposes. Then the push-rod is swung laterally tothe right, to the position shown in Fig. 5, the lower one'of the lingers 44 is brought into alinement with the arm Y30 ofthe 'bell-crank at a point distant from its pivotal point 29 so that it will cause the ribbon-guide to be shifted only high enough for the upper color zone of the ribbon; and when the push-bar -is swunlg tar enough to thev left to bring its upper linger 44 into action, this point of contact being closer tothe pivot 29. it will cause a greater movement of the bell-crank and will thus raise the ribbonguide tar enough tov bring its lower color zone into action. A

To permit the push-bar 34 to be thus laterally swung on its pivot, the pivotal connection; is made slightly loose, and, as a convenient means for thus shifting the pushforward extension e5, which'engiiges the lower forked end ot" an arm 46 carried by a transversely-arranged rod 47 which at one end is connected to a crank-shaft 48 journaled 'in the trame of the machine and provided with av thumb-nut 49 at the front of the machine. By turning thefthumb-nut, the part 47 will be reciprocated in either direction to thus shift the push-rod laterally to any one of its three positions. To hold the shift-rod et7 in its adjusted position, I extend the same through a Iduide 50 mounted on a convenient rigid mem er of thefframe of the machine, and at the bottom of this guide l provide an upwardly-extending V- shaped lugr 5l which is adapted .to'engage I with similarly-shaped teeth on the bottom edge oiLl the shift-bar 47, a coil-'spring 52,- being provided for pulling the' free end of the shift-bard? downwardly into engagement With said bevelledlug. 5l., It will be understoodgof course, that any! otherforin of detent device may be employed for lightly holding the push-rod l? in its adjusted position, andias shown inl Fig'. 3,A 53 may be employed in connection lWith a pointer on the thumbnut 4.9i for color indication. V This application '"is a substitute in' .part for my 3o-pending application' Serial No.

bar laterally, l provide the same Within im; n

278,872, filed February 24e, 1919, the claims V of which application will to thisapplicatioim v l claim:' l 1,-In a .typewriting machinmv'a type-carrier-actuator, a ribbon-guide, mechanism for actuating the ribbon-guide through the medium of said type-carrier--actuator embodying color-shift devices, and means on the be subordinated 4frame of the machine for insegni adjusting said color-shift devices.

2. In a typewriting machine, a typebar actuator and power means for actuating the Same, a ribbon-guide, mechanism actuated from the type-bar-actuator for vibrating said ribbon-guide, said mechanism embodying color-shift devices, caseshift devices and means for connecting the same to the ribbon-vibrating mechanism to compensate for changing case, and means on the frame for adjusting said`color-shift devices having constant connection with said colorshii't devices during the case-shift movemerm 3. In a typewriting machine, a type-carrier-actuator, a' ribbon-guide, a bell-cranklever having one arm connected to the ribbon-guide, and a push-bar connected to said actuator and adapted to engage the other arm Aof the bell-crank, for the purpose vset forth.

4. n a typewrmng machine, a type-carrior-actuator, a ribbon-guides bell-crank lever having one arm connected to the rib bon-guide, a puslvbar connected to said ace.

tuator and adapted to engage the other arm of the bell-crank, and 'spring means i'or returning the belhcrank and ribbon-,guide to normal position after each actuation.

5. In a typewri'ting machine, a power-ac' tuated type-bar-actuator,' a ribbon-guide, ribbon-vibrating mechanism connecting the ribbon-guide to the type-bar-actuator einbcdying a bell-crank having one arm conn nected to` the ribbonpuide, a-push-bar in engagement with the other arm of the bellcrank at its forward end and having pivotal connection atfits rear end to the typediaractuator, and a fore-and-aft swinging' link for hanging;r said push-bar to a support.

6. In a typewritingmachine, a ribbon-vn brating mechanism, a spring-actuated typebaractnato r adapted to operate said robbin mechanism to shift its ribbon-guide to printing position upon each strokes, and a case-shift device connected. to the ribbon-vibrating mechanism to vertically adjust the same to compensate for the shift or case.

7 in a typeivriting machine., a ribbon-vibrating mechanism, a spring-actuated type-- bar-'actuator adapted to operate said ribbon mechanism to shift its ribbon-guide to printing position upon each of its workingr strokes, and a platen-shift device connected to the ribbon-vibrating mechanism to vertically adjust the same to compensate for the' shift of the platen. y l

8. In a typewriting machine', a; power-actua-ted type-bar-actuator, a case-shift mechanisrn embodying a Verticaliy movable member, a ribbon-guide1 mechanism aetnated by said type-bar-actuator for vibrating;r

Athe ribbon-guide embodying a push-bar and a bell-crank, a supporting member pivoted ci' its working to the frame of the machine, means for pivotally' connecting the supporting member to the aforesaid vertically-movable member oi" the case-shift mechanism, and additional means for pivotaliy hanging said nush-bar to this supporting member.

9. in a typewriting machine, a nibbon-viA brating mechanism embodying a lever and an adjustable push-bar for engagement with one arm thereof, said push-bar having e pair of push-lingers adapteal'i'o engage said arm at dierent distances fromits ulcrum, means actuated by the printing instrumentelit-ies .for reciprocating said push-bar, said push-bar having an extension finger or pin on its forward end, means on the'i'ame for laterally adjusting the push-bar embodying' Aan endwisc adjustable bai having engagement With'said extension finger or in, and means for holding this endwise adiustable bar in its adjusted position.

10. ina typewritnig machine having :i case-shift mechanism and a power-driven type-bar-actuator, a `supporting member linked to the case-shift mechanism and piv oted at one end to the frame of the machine and having pivotally mounted on its other end a bell-crank connected to the ribbonguide, a laterally-adjustable push-bar connected to the actuator at its rear-end and having its front-end in engagement with said hell-crank, a link for supporting said push-bar, and devices at theforsvard end of said push-bar for varyingr the throw of the bell-crank by laterally shifting said pushbar with reference to the bell-crank.

1l.. In a typewriting machine, a type-oaractua-toi-f1ame and means for gifivingg,` it a toand-iro movement, said frame embodying pendent arms carrying an arcuate type-bar actuator-bar at its lower end` a 1'ibbon-vi brating mechanism located within the frame, below the plane oi the pivotal suspension points and above the actuator-bar, and connected to said actuator-frame as to vibrate with it, and a ribbon-guide connected to said ribbon-vibrating: mechanism.

i2. ln a typewriting machine, a type-bar- ;ctuator-frainc and incans for giving it a fore-and-aft movement. said frame cmbodying swinging pendent arms and a. type-baractuator carried at the lower end of the iframe, a supporting; member attached at its rear end to the frame ot' the vmachine and extendinginto said tvpclbar-actuator-frame, a bellcrank lever pivotally mounted on the foin 'ard end oi the supportiucr member having one end connected to the riblion-vibrator, and means connected to the tvpe-bar-actuator-fraine Afor actuatingv the other arm of the bell-crank when theltype-{mr-actuatorw frame is given its working stroke.

in testimony whereof l hereunto'-amx my signature.

MNSFELD C. CRAWLEY. 

